一篇超详细的Spring Boot整合Mybatis文章

目录配置文件形式pom.xmlapplication.yml：UserMapper.xmlUserMapper配置springboot整合mybatis在运行类上添加@MapperScan注解测试类效果总结

配置文件形式

pom.xml

<?xml version="1.0" encoding="UTF-8"?><project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">    <modelVersion>4.0.0</modelVersion>    <parent>        <groupId>org.springframework.boot</groupId>        <artifactId>spring-boot-starter-parent</artifactId>        <version>2.4.4</version>        <relativePath/> <!-- lookup parent from repository -->    </parent>    <groupId>com.keafmd</groupId>    <artifactId>spring-boot-09-mybatis</artifactId>    <version>0.0.1-SNAPSHOT</version>    <name>spring-boot-09-mybatis</name>    <description>Demo project for Spring Boot</description>    <properties>        <java.version>1.8</java.version>    </properties>    <dependencies>        <dependency>            <groupId>org.springframework.boot</groupId>            <artifactId>spring-boot-starter-jdbc</artifactId>        </dependency>        <dependency>            <groupId>org.springframework.boot</groupId>            <artifactId>spring-boot-starter-web</artifactId>        </dependency>        <dependency>            <groupId>org.mybatis.spring.boot</groupId>            <artifactId>mybatis-spring-boot-starter</artifactId>            <version>1.3.2</version>        </dependency>        <dependency>            <groupId>mysql</groupId>            <artifactId>mysql-connector-java</artifactId>            <scope>runtime</scope>        </dependency>        <dependency>            <groupId>org.springframework.boot</groupId>            <artifactId>spring-boot-starter-test</artifactId>            <scope>test</scope>        </dependency>    </dependencies>    <build>        <plugins>            <plugin>                <groupId>org.springframework.boot</groupId>                <artifactId>spring-boot-maven-plugin</artifactId>            </plugin>        </plugins>    </build></project>

配置数据源

在yml文件中配置数据源。

application.yml：

server:  port: 80# 配置数据源spring:  datasource:    url: jdbc:mysql://127.0.0.1:3306/ssm-java1?useSSL=false    driver-class-name: com.mysql.cj.jdbc.Driver    username: root    password: 18044229# 整合mybatismybatis:  #  typeAliasesPackage: com.neuedu.entity  mapper-locations: classpath*:com/neuedu/boot/mapper/*.xml

UserMapper.xml

这里注意!!!:一定是和UserMapper相同的目录，是个三级目录，创建时仿照这样创建com/keafm/mapper(正确的) 别这样com.keafam.mapper(错误的)，这样错误的创建的话，是个一级目录，不是三级的，后面运行的时候可能会提示找不到Mapper。

<?xml version="1.0" encoding="UTF-8"?><!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd"><mapper namespace="com.keafmd.mapper.UserMapper">    <select id="list" resultType="map">        select * from user    </select></mapper>

UserMapper

package com.keafmd.mapper;import org.apache.ibatis.annotations.Mapper;import java.util.List;/** * Keafmd * * @ClassName: UserMapper * @Description: * @author: 牛哄哄的柯南 * @Date: 2021-04-08 16:09 * @Blog: https://keafmd.blog.csdn.net/ */public interface UserMapper {    List list();}

配置springboot整合mybatis

在application.yml中配置：

# 整合mybatismybatis:  #  typeAliasesPackage: com.neuedu.entity  mapper-locations: classpath*:com/neuedu/boot/mapper/*.xml

在运行类上添加@MapperScan注解

SpringBoot09MybatisApplication：

package com.keafmd;import org.mybatis.spring.annotation.MapperScan;import org.springframework.boot.SpringApplication;import org.springframework.boot.autoconfigure.SpringBootApplication;@SpringBootApplication@MapperScan("com.keafmd.mapper")public class SpringBoot09MybatisApplication {    public static void main(String[] args) {        SpringApplication.run(SpringBoot09MybatisApplication.class, args);    }}

测试类

UserMapperTest ：

package com.keafmd.mapper;import com.keafmd.SpringBoot09MybatisApplication;import org.junit.jupiter.api.Test;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.boot.test.context.SpringBootTest;import java.util.List;import static org.junit.jupiter.api.Assertions.*;@SpringBootTest(classes = SpringBoot09MybatisApplication.class)class UserMapperTest {    @Autowired    UserMapper userMapper;    @Test    void list(){        List list = userMapper.list();        for (Object o : list) {            System.out.println(o);        }    }}

效果

总结

本篇文章就到这里了，希望能给你带来帮助，也希望您能够多多关注的更多内容！

爬上那座山，听最圣洁的经。